1 | /**
|
2 | * @license
|
3 | * Copyright 2020 Google Inc.
|
4 | *
|
5 | * Permission is hereby granted, free of charge, to any person obtaining a copy
|
6 | * of this software and associated documentation files (the "Software"), to deal
|
7 | * in the Software without restriction, including without limitation the rights
|
8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
9 | * copies of the Software, and to permit persons to whom the Software is
|
10 | * furnished to do so, subject to the following conditions:
|
11 | *
|
12 | * The above copyright notice and this permission notice shall be included in
|
13 | * all copies or substantial portions of the Software.
|
14 | *
|
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
21 | * THE SOFTWARE.
|
22 | */
|
23 | /**
|
24 | * AnimationFrame provides a user-friendly abstraction around requesting
|
25 | * and canceling animation frames.
|
26 | */
|
27 | var AnimationFrame = /** @class */ (function () {
|
28 | function AnimationFrame() {
|
29 | this.rafIDs = new Map();
|
30 | }
|
31 | /**
|
32 | * Requests an animation frame. Cancels any existing frame with the same key.
|
33 | * @param {string} key The key for this callback.
|
34 | * @param {FrameRequestCallback} callback The callback to be executed.
|
35 | */
|
36 | AnimationFrame.prototype.request = function (key, callback) {
|
37 | var _this = this;
|
38 | this.cancel(key);
|
39 | var frameID = requestAnimationFrame(function (frame) {
|
40 | _this.rafIDs.delete(key);
|
41 | // Callback must come *after* the key is deleted so that nested calls to
|
42 | // request with the same key are not deleted.
|
43 | callback(frame);
|
44 | });
|
45 | this.rafIDs.set(key, frameID);
|
46 | };
|
47 | /**
|
48 | * Cancels a queued callback with the given key.
|
49 | * @param {string} key The key for this callback.
|
50 | */
|
51 | AnimationFrame.prototype.cancel = function (key) {
|
52 | var rafID = this.rafIDs.get(key);
|
53 | if (rafID) {
|
54 | cancelAnimationFrame(rafID);
|
55 | this.rafIDs.delete(key);
|
56 | }
|
57 | };
|
58 | /**
|
59 | * Cancels all queued callback.
|
60 | */
|
61 | AnimationFrame.prototype.cancelAll = function () {
|
62 | var _this = this;
|
63 | // Need to use forEach because it's the only iteration method supported
|
64 | // by IE11. Suppress the underscore because we don't need it.
|
65 | // tslint:disable-next-line:enforce-name-casing
|
66 | this.rafIDs.forEach(function (_, key) {
|
67 | _this.cancel(key);
|
68 | });
|
69 | };
|
70 | /**
|
71 | * Returns the queue of unexecuted callback keys.
|
72 | */
|
73 | AnimationFrame.prototype.getQueue = function () {
|
74 | var queue = [];
|
75 | // Need to use forEach because it's the only iteration method supported
|
76 | // by IE11. Suppress the underscore because we don't need it.
|
77 | // tslint:disable-next-line:enforce-name-casing
|
78 | this.rafIDs.forEach(function (_, key) {
|
79 | queue.push(key);
|
80 | });
|
81 | return queue;
|
82 | };
|
83 | return AnimationFrame;
|
84 | }());
|
85 | export { AnimationFrame };
|
86 | //# sourceMappingURL=animationframe.js.map |
\ | No newline at end of file |